Transmission device.



w. H. ZAGHMANN.

TRANSMISSION DEVICE.

APPLICATION IILED AUG.4, 1911.

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TRANSMISSION DEVICE.

APPBIUATION rum) AUGA, 1911.

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%TATE% PATENT OldFiQE.

WILLIAM H. ZACHMANN, OF WOODHAVEN, NEW YORK, ASSIGNOR IO AMERICAN EVERREADY COMPANY, A CORPORATION OF NEW YORK.

TRANSMISSION DEVICE.

Application filed August 4, 1911.

To all whom it may concern:

Be it known that I, YVILLIAM H. Zaon- MANN, a citizen of the UnitedStates, residing at .Voodhaven, borough of Queens, city of New York, inthe county of Queens and State of New York, have invented a certain newand useful Improvement in Transmission Devices, of which the followingis a specification, reference being had therein to the accompanyingdrawings, forming part thereof.

My invention relates to mechanisms for the transmission of power, andmeans embodying my invention are particularly adapted to transmit powerfrom a moving part of a vehicle, such as a wheel, to vehicledrivcnregistering devices, such as fare reg isters or taximeters. As is wellknown, such transmission mechanisms necessarily effect a veryconsiderable reduction in movement. For example, in the case oftaximeters which receive four actuations in a mile and which are drivenfrom vehicle wheels of thirty-two inches diameter, the reduction fromthe vehicle-wheel. to the number-wheels of the taximeter must beapproximately 160 to 1, since, in progressing a quarter of a mile, thevehicle-wheel rotates substantially one hundred and sixty times.Ordinarily the greater part of this reduction occurs in the connectionbetween the vehicle-wheel and the flexible shaft which transmits themoveaent to the taximeter, and a Worm drive is ,most commonly employedto effect this reduction.

One of the objects of my invention is to provide a. transmissionmechanism for this purpose which will be of maximum durability.

Other objects are compactness, sin'iplicity and economy of construction,and reliability of operation.

Still other objects and advantages of my thereof. Fig. is an inner faceview of the cover. Figs. s and 5 are, respectively, a

Specification of Letters Patent.

Patented Feb. 11 31, 1%13.

Serial No. 642,390.

face view and a central transverse section of a member of the geartrain. Figs. 6, 7 and 8 are, respectively, side and rear elevations anda plan View, on a reduced scale, of the complete mechanism attached-to asteering arm of a vehicle.

In the illustrated embodiment of my invention, I employ a two-partcasing comprising a body portion 1 andv a removable cover 2, attached inany suitable way, as by screws. and in this case is inclosed a geartrain which will be described hereinafter. Two dowel pins 21. areprovided in the cover to assure the proper fitting together of the bodyand cover. In the body portion 1 is jour naled a stub shaft 3, which Iterm the driving shaft, and in the cover 2 is 'journaled a shorter stubshaft 4, which I term the driven shaft, the. two shafts being inalinementwhen the casing is closed. The driving shaft 3. has its innerend, which projects into the casing, of reduced diameter, leaving ashoulder, and on this reduced end, alongside of the shoulder, is pinnedor otherwise fixed a pinion On the inner end of the driven shaft l: ispinned or otherwise fixed a gear wheel 6.

The driving shaft 3 has its bearing in a hollow plug member 7, whichscrews into a screw-threaded bore in the casing and is locked therein,as by a screw plug 8., The pinion 5 bears against the inner face of thisplug and thereby holds the driving shaft 3 in place. On the outer end ofthe driving shaft 3 is fixed a spur gear wheel 9, which is adapted tomesh with and be driven by a gear wheel on the hub of a wheel of thevehicle in the usual way.

The driven shaft 4 has its bearing in a hollow plug 10, which isinserted in a smooth bore in the cover 2, and on the other end of theshaft 4, which projects from the plug 10 and is reduced in dian'ieter,is fixed a bevel gear 11, which meshes with a bevel gear 12 on a stubshaft or stem 13, attached to a short section of flexible shaft 14.Through these connections the gear wheel (1 drives the flexible shaft;14. The section of tlexiblc shaft 14- is opcratively comicctcd to theusual flexible shaft, and is contained in a rigid swiveled bent tube tinwhich has a. flanged inner end clamped between a up nut 16 and a hollowplug 17 on which the cap nut screws and which serves as a bearing forthe stem 1e. The plug 17 screws into an elbow tube 18, which is screwedupon the outer end of the plug 10 and serves as a casing for the bevelgears 11 and 12.

To operatively connect the pinion 5 and the gear wheel (3, a removabletrain of reducing gears is employed suitably mounted in the casing. Asshown,this train consists of three double-gear members 19, such asillustrated in Figs. 4c and 5. These doublegear members comprise a gearwheel of the size of the gear wheel 6, and a pinion of the size of thepinion 5, arranged co-axially with and pinned to the gear wheel.Extending from theside of the body portion 2 is a stud 20,,on which twoof the double-gear membars are mounted, one alongside the other, thethird being mounted on the inner reduced end of the shaft 3 alongside ofthe pinion 5. The parts are so designed that, when the casing is closed,the pinion 5 meshes with the gear wheel'of the member 19, which isimmediately above the pinion 5 and on the stud 20, and the pinion. ofthis member meshes with the gear wheel of the member 19, which is on theshaft 3, and the pinion of this member meshes with the gear wheel of theother member 19 on the stud 20, and the pinion of this member mesheswith the gear wheel 6. 30'

As shown, the gear Wheels have twice as many teeth as the pinions andhence each reduction is 2 to 1, and since there are four suchreductions, the'total reduction is 16 to 1.

The casing is attached to the steering arm 22 (a portion of which isshown) by two links 23 and 24:, the former of which is clamped to theneck of the plug member 7 by a clamping member 25, and the latter ofwhich is attached to an car 26 on the casing, as shown. These partsserve as the wellknown universal bracket by means of which the casingmay be adjusted and secured in any position relative to the steeringknuckle, and held with the spur gear wheel 9 in mesh with its drivinggear on the hub of the wheel.

It will be noted that, while I have in my construction eliminated worms,which are short lived, and employ only gearing, which is subjected to arolling instead of a rubbing action, and hence will wear much longer, myconstruction is extremely simple and coinpact and afi'ords easyaccess'for the repair and replacement of parts. Furthermore, the partssubjected to the greater wear are tightly incased so that dust isotl'ectivelv excluded and the parts may be effectively and constantlylubricatcrl.

It is obvious that various modifications may be made in the constructionshown and above particularly described within the principle and scope ofmy invention.

I claim 1. transmission mechanism for vehicle driven registeringdevices, comprising, in combination with flexible means for connectionwith a registering device, a casing including'two separable parts, adriving and a driven shaft, one journaled in each part of the casing andthe driven shaft having operative connection with the flexible means, agear wheel permanently fixed on the inner end of each shaft, a. drivinggear on the outer end of the drivingshaft arranged to have operativeconnection with a vehicle wheel, and a train of reducing gearingcomprising a plurality of double-gear members suitably mounted in thecasing and arranged to operatively connect the two gears on the innerends of the shafts when the casing is closed;

2. A transmission mechanism for vehicledriven registering devices,comprising, in combination with flexible means for connection with aregistering device, a casing including two separable parts, a drivingand. a driven shaft, one journaled in each part of the casing and thedrive shaft having operative connection with the flexiblemeans, a gearwheel permanently fixed on the inner end-of each shaft, a driving gearon the outer end of the driving shaft arranged to have operativeconnection with a vehiclewheel, a gear-carrying stud projecting inwardlyfrom one of the parts of the casing, and reducing gearing comprising aplurality of gear members loosely mounted, someon the stud and others onone of the shafts and arranged to operatively connect the two gears onthe inner ends of the shafts when the casing is closed.

' .3. A transmission mechanism for vehicle .drivcn registering devices,comprising, in

combination with a flexible shaft and with sultable attaching means, acasing including a body portion and a removable cover, a

gear-carrying stud projecting from the bottom of the body portion, adriving shaft j ournaled in the body portion, a pinion fixed on theinner end thereof, and a driving gearwheel on the outer end thereofarranged to have operative connection with a vehicle wheel, a drivenshaft journaled in the cover iortion and having operative connectionwith the flexible shaft, :1 gear-wheel fixed on the inner end of thedriven shaft. and a removable train of reduping gears in the casingcomprising a plurality of double-gear members loosely mounted some onthe gearcarrying stud and some on the driving shaft and arranged totransmit actuation from the driving to the driven shaft.

4-, A transmission meclmnisln for vehicledrivon registering devices,comprising, in combination with a flexible shaft, a casing in two partsincluding a body portion and'a cover, a gear-carrying stud projectingfrom one of the parts and a driving shaft extending into the casing andjournaled in said part, a pinion fixed on the inner end of the drivingshaft, a driven'gear fixed on the outer end of the rotatable stud andarranged to have operative connection With a vehicle Wheel and to rotatethe driving shaft and pinion, suitable attaching means for holding thedriving gear in operative engage ment With the vehicle Wheel,flexible-shaftdriving means carried by the other part and connected torotate the flexible shaft, and a train of reducing gears, a plurality ofdouble-gear members loosely mounted, some on g &

the stud and some on the driving shaft and operatively arranged toreceive actuation." from the said pinion and to transmit actu-.. at-ionto the fiexible-shaft-driving means When the casing is closed.

In testimony whereof I have afiixed my signature in presence of. twoWitnesses.

WILLIAM H. ZACHMANN.

Witnesses:

VICTOR D. Boner, BERNARD COWEN.

